#!/usr/bin/env python
# encoding: utf-8

"""
登录程序：
GET /：首页，返回Home；
GET /signin：登录页，显示登录表单；
POST /signin：处理登录表单，显示登录结果。
Flask通过Python的装饰器在内部自动地把URL和函数给关联起来
"""

from flask import Flask
from flask import request

app = Flask(__name__)


@app.route("/", methods=['GET', 'POST'])
def home():
    return '<h1>首页</h1>'


# http://127.0.0.1:5000/signin
@app.route("/signin", methods=['GET'])
def signin_form():
    return """<form action="/signin" method="post">
              <p><input name="username"></p>
              <p><input name="password" type="password"></p>
              <p><button type="submit">Sign In</button></p>
              </form>
    """


@app.route('/signin', methods=['POST'])
def signin():
    """
    需要从request对象读取表单内容
    :return:
    """
    if request.form['username'] == 'admin' and request.form['password'] == 'admin':
        return '<h3>Hello,admin!</h3>'
    return '<h3>用户名或密码不对！</h3>'


if __name__ == '__main__':
    app.run()
